Safety elevator-lock



(No Model.) 2 Sheets-Sheet 11.

J. R. HERSH.

SAFETY ELEVATOR LOOK.

N0. 535,008. Patented Mar. 5, 1895'.

(OXOXOXOXOXOXO) Jzv z grd/v v (No Model. 2 Sheets-Sheet 2 J. R. HERSH.

SAFETY ELEVATOR LOOK.

No. 535,008. Patented Mar. 5,1895

UNITED STATES PATENT Orrion.

JOHN R. HERSH, OF DENVER, COLORADO.

SAFETY ELEVATOR-=LOCK.

SPECIFICATION forming part of Letters Patent No. 535,058, dated March 5,1895.

Application filed May 18, 1894. Serial No. 511,665. (No model.)

To a, whom it may concern.-

Be it known that I, JOHN R. HERSH, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of 0010- rado,have invented certain new and useful Improvements inSafetyElevator-Locks; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, and to theletters of reference marked thereon.

The present invention relates to elevators and has for its object theprovision of simple, but thoroughly efficient, automatically operatingmeans, for preventing the lowering or raising of the elevator While adoor thereof may be open, and also for preventing the opening of thedoor before the car is level with the floor; and'for insuring theclosing of the door when the same has been partially shut; and to theseends the invention consists in the means employed constructedsubstantially as and for the purpose hereinafter specified.

In the drawings :--Figure 1 is a side elevation from the inside of thecar, the door being closed; Fig. 2, a detail plan view of the mechanismcarried by the car, and a horizontal section of a portion of that uponthe door. Figs. 3 and 4c are sections respectively, upon lines 0c0c, andy-y, of Fig. 2; Fig. 5, a plan view of my invention as applied to therope form of controller; Fig. 6, a section on line 2-2 of Fig. 5; Fig.7, a detail view of a connecting rod employed in the form shown in Figs.5 and 6.

In Figs. 1 to 4, I show my invention applied to an elevator in which thestarting and stopping mechanism is actuated by means of a hand lever Apivoted within the car, and guided and limited in its movements, asusual, bycurved plates at, a, near its upper end. Socured to the carside behind the lever A is a plate B that has two inwardly projectinglugs b, b, to and between which is pivoted a bar 0 that has twoprojections c, c, that, in the manner to be described, are adapted toengage said lever upon opposite sides and lock it against movement ineither direction from its mid, or stopping position. To place thelocking bar 0 in. engagement with the lever said bar is swung from avertical to a horizontal position, and said movement is effected througha bell-crank lever D that is pivoted to a plate E secured to the outsideof the car and the arm (1 of which lever is adapted to strike againstsaid bar as clearly shown in Figs. 2 and 4, when said lever is turned inthe right direction. When the lever D is moved away from the bar O thelatter, by gravity, drops out of engagement with the lever A. The platesB and E are of course slotted to permit the swinging of the lever D asdescribed.

The motions of the lever D are caused by a second bell crank lever F towhich it is connected by a rod G, and which lever F is pivoted to aplate H secured to the outside of the car near the door opening. A plateI secured to and projecting inward from the edge of the sliding door J,is adapted to alternately engage the arms of the lever F, as the door isopened and closed, and operates in the former instance to swing thelever D to throw the locking bar G into engagement with the lever A, andin the latter case to release said lever A, by reversing the movement ofthe lever D. Owing to the position of the lever F the door J almostimmediately after it is started in the direction tov open it engagessaid lever F, and thus locks the lever A, while for the same reason, thelatter is not released until the door is almost entirely closed. As thedoor swings the lever F only through half of its turn the completion ofthe motion of said lever is effected by means of a spring coiled arounda rod K that is pivotally connected to said lever at one of its ends,and at its other end plays through an opening. in a pivoted block Z,that is mounted between ears on a plate L attached to the car side.

A spring we coiled around a rod M attached. to the plate B, and having ahorizontal extension 12, to engage the bar 0 acts as a yielding stop tolimit the upward swing of said bar.

The plate I is nearly as long as the door and has its ends curved asshown, and secured upon the outside of the car are two rollers O, O thatare a distance apart greater than the length of the plate I, and justescape said plate when the door is entirely closed. Unless the carbottom is level with the floor at which a stop is to be made, the doorcannot be'opened as said plate I will strike one or the other of saidrollers, whether the car be too high or too low; and it will be furtherseen, that if the door he not wholly closed, upon movement of the careither up or down, one of the curved ends of the plate will strike aroller and the door will thereby be moved into a fully closed position.

To apply my invention to a rope controller P two oppositely movinglevers Q, Q, are substituted for the bar C, which are adapted to beswung into and out of engagement with said rope P by the oscillation ofa lever D that corresponds to the lever D, and which is connected by ayielding connection 1*, with each lever Q. Such connection is formed oftwo rods between whose ends is placed a coiled spring, and which springand portions of the rods are inclosed by a tube, as clearly shown inFig. 7.

While preferring the construction shown and described I do not wish tobe understood as limiting my invention thereto, as changes can be madewithout departure from the scope of the invention.

By the word controller I mean to cover in the claims any form thereof,whether lever or rope.

What I claim is- 1. In combination with the controller of an elevator, apivoted locking device for said controller, a lever, connections betweenthe lever and such device, and a part carried by the elevator door toengage said lever both when the door is opened and when it is closed, asset forth.

2. In combination with the controller of an elevator, a locking devicefor the controller, a lever, connections between the lever and suchdevice and adapted to be partially moved in opposite directions by themovement of the door in opening and closing, and a spring to completethe motion of said lever, as specified.

3. In combination, with the controller of an elevator, and the slidingelevator door, a lock for said controller, a plate carried upon the doorand adapted to actuate said lock, and having its ends curved, and parts,as rollers, carried by the car and adapted to co-operate with saidcurved ends to slide the door as the elevator moves up or down,substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

JOHN R. HERS I'I.

WVitnesses:

H. E. How, (3. A. SCOTT.

